Video: RIST – an evolutionary video transport protocol

Delivering low-latency live-video over the public internet, or any network which sees packet loss is ever a challenge, but recently there have been a number of protocols which have been created to allow this to work.

The problem to be fixed is that packets get lost and when you have a video decoder trying to output 50 images every second, there really isn’t time to deal with missing packets. Protocols such as SRT, Zixi and, now, RIST allow a mechanism which adds a small buffer and a mechanism to request missing data.

This isn’t a problem, in general, for live streaming to consumers on devices or computers such as Netflix or iPlayer because they use HLS or similar protocols based on TCP, but for low-latency streams this is not practical.

In this talk Kieran Kunhya explains more about these basics, the challenges to be overcome and the ways of dealing with them.

He covers:

  • UDP & TCP.
  • RIST and other similar protocols
  • Retransmissions
  • Negative Acknowledgements
  • Implementations of RIST
  • Future plans for RIST
  • A live demo

Watch now!

Speaker

Kieran Kunhya Kieran Kunhya
Founder,
Open Broadcast Systems

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